Room-temperature gas sensing of ZnO-based gas sensor: A review

Novel gas sensors with high sensing properties, simultaneously operating at room temperature are considerably more attractive owing to their low power consumption, high security and long-term stability. Till date, zinc oxide (ZnO) as semiconducting metal oxide is considered as the promising resistiv...

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Published inSensors and actuators. A. Physical. Vol. 267; pp. 242 - 261
Main Authors Zhu, Ling, Zeng, Wen
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 01.11.2017
Elsevier BV
Subjects
Detection
Flammability
Flammable atmospheres
Flammable gases
Gas detectors
Gas sensing
Gas sensors
Metal oxides
Operating temperature
Power consumption
Room temperature
Room-temperature operation
Semiconductor material
Semiconductors
Studies
Zinc oxide
ZnO
ZnO
Gas sensing
Semiconductor material
Room-temperature operation
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Summary:Novel gas sensors with high sensing properties, simultaneously operating at room temperature are considerably more attractive owing to their low power consumption, high security and long-term stability. Till date, zinc oxide (ZnO) as semiconducting metal oxide is considered as the promising resistive-type gas sensing material, but elevated operating temperature becomes the bottleneck of its extensive applications in the field of real-time gas monitoring, especially in flammable and explosive gas atmosphere. In this respect, worldwide efforts have been devoted to reducing the operating temperature by means of multiple methods In this communication, room-temperature gas sensing properties of ZnO based gas sensors are comprehensively reviewed. Much more attention is particularly paid to the effective strategies that create room-temperature gas sensing of ZnO based gas sensors, mainly including surface modification, additive doping and light activation. Finally, some perspectives for future investigation on room-temperature gas-sensing materials are discussed as well.
Bibliography:ObjectType-Article-1
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ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2017.10.021